Constitution class refit corridors (TWOK/TSFS) [WIP]

This is not a redress of my TMP corridors but is actually a clean scratch build. The work here will be relit to replace those later. Essentially having gained several months experience with Blender since I did that set and also having discovered some inaccuracies therein, I felt a clean start was ideal. This is technically a work in progress as I'm still missing some TWOK parts, but I'm very happy with the materials and lighting right now.